[openssl/openssl] 6f252d: BIO_s_dgram: add documentation and hazard warnings

[Hugo Landau]

  Branch: refs/heads/openssl-3.0
  Home:   https://github.com/openssl/openssl
  Commit: 6f252dd632afe0f24139a6c75958a8d8245a4e6a
      https://github.com/openssl/openssl/commit/6f252dd632afe0f24139a6c75958a8d8245a4e6a
  Author: Hugo Landau <hlandau at openssl.org>
  Date:   2023-01-05 (Thu, 05 Jan 2023)

  Changed paths:
    M doc/build.info
    A doc/man3/BIO_s_datagram.pod
    M doc/man3/DTLSv1_listen.pod
    M util/missingcrypto.txt
    M util/missingmacro.txt
    M util/other.syms

  Log Message:
  -----------
  BIO_s_dgram: add documentation and hazard warnings

Reviewed-by: Richard Levitte <levitte at openssl.org>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19913)

(cherry picked from commit 69e18a4d93ee5f50bcbf62268b4a59df29d67a02)